Why is the loop not working?

Question

JavaScript

Why doesn't this code work?

let arr = [1, 2, 3, 1, 3];


function nonUniqueElements(arr){
    for (let i = 0; i < arr.length; i++){
        console.log(arr[i]);
    }
  
}
nonUniqueElements();

Answer 1

need to pass an array
nonUniqueElements(arr);